Filler

The filler has a 40% chance of not placing a block but still using the energy it would have.

Quarry

The quarry's mechanical arm moves at a speed dependent on how much energy it is able to draw from the internal storage. The exact formula for calculating movement speed is 0.015 + Energy Per Action / 200, meaning it will move at a minimum of 0.015 meters per tick, to a max of 0.015 + 9/200 = 0.06 meters per tick. In comparison, this is approximately the same speed as sneaking.

While digging, the quarry tries to perform an action every tick, which is why the energy per action is lower than other machines.